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Texas Instruments LM4128DMFX-3.0/NOPB
- Part No.:
- LM4128DMFX-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4128DMFX-3.0/NOPB.pdf
- Description:
- IC VREF SERIES 1% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,445
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Product details
Overview
LM4128DMFX-3.0/NOPB from Texas Instruments is a precision micropower series voltage reference in 5-pin SOT-23 package, delivering 3.0 V output with ±0.5% initial accuracy (C grade), 100 ppm/°C max temperature coefficient, and 60 µA supply current. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load, and operates from −40°C to +125°C - ideal for battery-powered instrumentation and portable data acquisition systems.
For engineers reviewing the LM4128DMFX-3.0/NOPB datasheet, LM4128DMFX-3.0/NOPB pinout, LM4128DMFX-3.0/NOPB application, or LM4128DMFX-3.0/NOPB equivalent, key selection criteria include its 3.0 V fixed output, low dropout (400 mV at 10 mA), stability with capacitive loads up to 10 µF, and absence of required external stabilization capacitor - enabling compact, low-power analog front-end designs.
Technical Context
The LM4128DMFX-3.0/NOPB implements a band-gap–based series voltage reference architecture with internal enable control logic and thermal compensation. Its design eliminates need for external stabilizing capacitor while maintaining stability with output capacitance up to 10 µF, including low-ESR ceramic types.
It operates as a two-terminal active reference: VIN supplies power above VREF + 400 mV (min), EN controls activation (VIH ≥65% VIN, VIL ≤35% VIN), and VREF delivers regulated 3.0 V output referenced to GND. The N/C pin (Pin 1) must remain unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal, ±0.5% initial accuracy (C grade) - ensures stable ADC/DAC reference within 15 mV tolerance at 25°C |
| Tempco | 100 ppm/°C max (C grade) - limits drift to ±12 mV over −40°C to +125°C operating range |
| Supply Current | 60 µA typical - enables multi-year operation on coin-cell batteries in always-on sensor nodes |
| Shutdown Current | 3 µA max when EN = 0 V - reduces quiescent power by >95% during system sleep modes |
| Dropout Voltage | 400 mV max at 10 mA load - allows operation from 3.4 V input, compatible with single Li-ion or 3.3 V rail |
| Load Capability | 20 mA max output - sufficient to drive SAR ADC references, op-amp bias networks, and small DACs |
| Noise (0.1–10 Hz) | 285 µVPP - supports 16-bit+ precision in low-frequency measurement circuits |
Pinout & Package
LM4128DMFX-3.0/NOPB uses the 5-pin SOT-23 (DBV) package - surface-mount, 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must be left floating; no internal connection - PCB pad may be omitted or isolated |
| 2 - GND | Reference ground return | Primary current return path; requires low-impedance connection to system ground plane |
| 3 - EN | Enable control input | Active-high logic: VIH ≥65% VIN enables regulation; VIL ≤35% VIN forces 3 µA shutdown |
| 4 - VIN | Power input supply | Accepts 3.4 V to 5.5 V (VREF + 400 mV min); bypass capacitor CIN ≥0.1 µF required |
| 5 - VREF | Precision reference output | Delivers regulated 3.0 V; stable with COUT up to 10 µF; optional for noise/transient improvement |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0 V output | Eliminates external resistor network; guarantees monotonicity and avoids trimming errors in production |
| Enable pin with 3 µA shutdown | Enables dynamic power gating in multi-stage signal chains without external MOSFET switches |
| No external stabilization capacitor needed | Reduces BOM count and board area; simplifies layout for space-constrained portable designs |
| Stable with 10 µF capacitive loads | Supports fast load transient response in high-capacitance ADC reference buffers without oscillation |
| −40°C to +125°C operation | Validated for automotive under-hood and industrial control environments without derating |
Applications
| Portable Data Acquisition | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Handheld multimeter sampling analog inputs via 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for ADC full-scale calibration and offset nulling. Use Value: ±0.5% initial accuracy and 100 ppm/°C tempco ensure <0.02% measurement error across temperature, meeting Class II handheld meter specs. |
Use Scenario: Wireless sensor node measuring temperature/pressure with ultra-low duty cycle. IC Role / Device Role / Timing Role: Supplies reference to analog front-end during brief active periods; disabled between samples. Use Value: 3 µA shutdown current extends CR2032 battery life beyond 5 years at 1-sample-per-minute duty cycle. |
| Automotive Cabin Control | Industrial Process Monitoring |
Use Scenario: HVAC control module digitizing thermistor and potentiometer signals in vehicle cabin. IC Role / Device Role / Timing Role: Reference source for microcontroller's internal ADC and external signal conditioning op-amps. Use Value: −40°C to +125°C guaranteed operation and AEC-Q100 Grade 1 qualification (LM4128Q variant) support automotive deployment. |
Use Scenario: DIN-rail mounted PLC analog input module converting 4–20 mA loop signals. IC Role / Device Role / Timing Role: Precision reference for current-to-voltage conversion and ADC scaling in isolated input stages. Use Value: 20 mA output capability drives multiple parallel 12-bit ADC references and op-amp bias networks simultaneously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3030AIDBZR | 3.0 V, ±0.2% initial accuracy (A grade), 50 ppm/°C, 50 µA IQ, SOT-23-3 - no enable pin, lower tempco | Lacks shutdown control; suited for always-on, higher-accuracy applications where enable is unnecessary | Choose REF3030AIDBZR when highest accuracy and lowest drift outweigh need for power gating |
| MAX6029AEUR+T | 3.0 V, ±0.2% initial accuracy, 75 ppm/°C, 35 µA IQ, SOT-23-5 - includes enable, but only rated to +85°C | Not qualified for extended temperature range; unsuitable for under-hood or industrial ambient >85°C | Choose MAX6029AEUR+T only for commercial-temperature consumer devices requiring lowest IQ |
Compared with REF3030AIDBZR and MAX6029AEUR+T, LM4128DMFX-3.0/NOPB uniquely balances C-grade accuracy, full industrial temperature range, integrated enable, and capacitor-free stability - making it optimal for cost-sensitive, battery-aware, wide-temperature embedded systems where both precision and power control matter.
Availability
LM4128DMFX-3.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensors, and automotive cabin electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4128DMFX-3.0/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader focused on analog and embedded processing technologies, with decades of expertise in precision analog ICs and industrial-grade reliability.
LM4128DMFX-3.0/NOPB belongs to TI's precision micropower voltage reference product line, designed specifically for space-constrained, low-power, wide-temperature applications in instrumentation, portable equipment, and automotive subsystems.
FAQ
What is the guaranteed initial accuracy of LM4128DMFX-3.0/NOPB?
The LM4128DMFX-3.0/NOPB is a C-grade device with guaranteed initial output voltage accuracy of ±0.5% at 25°C, corresponding to ±15 mV deviation from the nominal 3.0 V output. This specification is production-tested and applies across the full operating temperature range per the datasheet's boldface limits.
Does LM4128DMFX-3.0/NOPB require an external output capacitor?
No, LM4128DMFX-3.0/NOPB is stable without an external output capacitor and does not require one for basic operation. An optional COUT (up to 10 µF) improves load transient response but is not mandatory - unlike many references, it needs only the required CIN (≥0.1 µF) on VIN.
What is the minimum input voltage required for LM4128DMFX-3.0/NOPB to regulate properly?
LM4128DMFX-3.0/NOPB requires VIN ≥ VREF + 400 mV = 3.4 V at 10 mA load. At lighter loads, dropout decreases - e.g., 175 mV typical at 10 mA for 3.0 V version - but 3.4 V is the guaranteed minimum for full 20 mA output compliance across temperature.
Can LM4128DMFX-3.0/NOPB drive a 10 µF capacitive load?
Yes, LM4128DMFX-3.0/NOPB is explicitly characterized and guaranteed stable with capacitive loads up to 10 µF, including low-ESR ceramic types. This enables direct buffering of high-capacitance ADC reference inputs without risk of oscillation or overshoot.
Is LM4128DMFX-3.0/NOPB qualified for automotive applications?
LM4128DMFX-3.0/NOPB itself is not AEC-Q100 qualified; however, the pin-compatible LM4128QDMFX-3.0/NOPB variant is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on TI's automotive flow. For automotive use, specify the Q-suffix part.
LM4128DMFX-3.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- 285µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3.4V ~ 5.5V
- Current - Supply:
- 100µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4128DMFX-3.0/NOPB FAQ
1.How can I place an order for LM4128DMFX-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4128DMFX-3.0/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM4128DMFX-3.0/NOPB reliable?
The price and inventory of LM4128DMFX-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4128DMFX-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4128DMFX-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4128DMFX-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4128DMFX-3.0/NOPB?
LM4128DMFX-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4128DMFX-3.0/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM4128DMFX-3.0/NOPB?
For technical support, including LM4128DMFX-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4128DMFX-3.0/NOPB requirements.
6.How does Aetrix verify that LM4128DMFX-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4128DMFX-3.0/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM4128DMFX-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4128DMFX-3.0/NOPB?
All LM4128DMFX-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4128DMFX-3.0/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM4128DMFX-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4128DMFX-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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